Study on phase sensitive amplifier using PPLN wabeguides

2014 Fiscal Year Final Research Report

• Project/Area Number: 25889052
• Research Category: Grant-in-Aid for Research Activity Start-up
• Allocation Type: Single-year Grants
• Research Field: Communication/Network engineering
• Research Institution: Tokai University
• Principal Investigator: ASOBE Masaki 東海大学, 工学部, 教授 (60522000)
• Research Collaborator: TAKENOUCHII Hirokazu NTT先端集積デバイス研究所
• Project Period (FY): 2013-08-30 – 2015-03-31
• Keywords: 位相感応増幅 / 光増幅器 / 周期分極反転 / 擬似位相整合 / ニオブ酸リチウム

Outline of Final Research Achievements

We studied phase sensitive amplifier (PSA) which allows us to amplify optical signal with low noise quality. The efficiency of the carrier phase recovery was improved more than 10 dB by improving the design of optical device. We proved that stable phase locking and negligible degradation of signal quality is possible by modification of phase locked loop circuit. We also demonstrated amplification of polarization multiplexed signal by using two PPLN waveguide in polarization diversity configuration. We examined dispersion tolerance of the PSA experimentally and we found that signal quality can be recovered by amplification in PSA if the phase variation within a signal bandwidth is below π/2.

Free Research Field

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